Motor Drives (DL PEL205)
PL-950727
The DL PEL205 is a multipurpose bench for AC and DC motor drives where power electronics converters are studied as interfaces between input power and motors to control speed and position. The trainer is dedicated to the study of different types of machine drives: the DC motor drives with inner current loop, the AC slip-ring motor drives with rotor resistance regulation, and AC squirrel cage motor based variable frequency drives, all of them with speed control. In order to simulate various loading conditions for both DC and AC motors, we have introduced a brushless motor servo drive system that operates in both speed and torque control modes, supporting bidirectional rotation of brushless motors to facilitate four-quadrant operation for DC motors. Additionally, it features display capabilities, protection mechanisms, and supports speed and torque feedback, enhancing its user-friendliness and closed-loop feasibility. Its modular structure makes it easy to reconfigure the system to perform several experiments in various subjects such as single-phase full-bridge DC chopper/inverter (square wave or sine wave with PWM control), frequency converter, to name a few.
Experiments:
DC MOTOR DRIVE
DC motor drive by single-phase rectifiers
- Single-quadrant drive with 1-ph controlled rectifier
- Single-quadrant drive with 1-ph controlled rectifier for closed loop armature voltage control
- Single-quadrant drive with 1-ph controlled rectifier for closed loop armature voltage control with feedforward
- Single-quadrant drive with 1-ph controlled rectifier for single closed loop speed control
- Single-quadrant drive with 1-ph controlled rectifier for dual closed loop speed control
- Two-quadrant drive (I-IV) with 1-ph controlled rectifier
- Two-quadrant drive (I-III) with 1-ph controlled rectifier
- Two-quadrant drive (I-III) with 1-ph controlled rectifier for dual closed loop speed control
- Four-quadrant drive with 1-ph controlled rectifier
- Four-quadrant drive with 1-ph controlled rectifier for dual closed loop speed control
DC motor drive by three-phase rectifiers
- Single-quadrant drive with 3-ph controlled rectifier
- Single-quadrant drive with 3-ph controlled rectifier for dual closed loop speed control
CONSTANT FREQUENCY DRIVE – SLIP RING MOTOR
Stator voltage control
- Stator voltage control with variac
- Stator voltage control with AC voltage controller
- Speed control by stator voltage control with AC voltage controller
Rotor resistance control
- Rotor resistance control with rheostat
- Rotor resistance control with pulsed resistor
- Speed control by rotor resistance control with pulsed resistor
- Rotor resistance control with Scherbius static drive
- Speed control by rotor resistance control with Scherbius static drive
VARIABLE FREQUENCY DRIVE – SQUIRREL CAGE MOTOR
Frequency converter
- Operation of the frequency converter
- Input controlled rectifier
- Output inverter
- DC link brake chopper
Squirrel cage motor
- Preliminary investigation of the squirrel cage motor
Modulation methods of frequency converter
- Six-step modulation
- Square wave PWM
- Trapezoidal wave PWM
- Sinusoidal wave PWM (SPWM)
- Space vector PWM (SVPWM)
- 3rd harmonic injection
Induction motor control following U/f characteristic
- Motor magnetization for linear U/f characteristic
- Extra start magnetization
- IxR compensation
- Operation in standard converter setting
- Scaled-down operation in star connection
Speed control
- Slip compensation
- Closed loop speed control
Modules List DL PEL205:
- DL 2106T01: Control module,
- DL 2106T02: SCR driver,
- DL 2106T04: IGBT,
- DL 2106T06: Frequency converter,
- DL 2106T12: Diode stack,
- DL 2106T15: SCR stack,
- DL 2106T21: Fuse box,
- DL 2106PS: DC power supply,
- DL 2106SPS: Single-phase power supply,
- DL 2106TPS: 3-ph power supply,
- DL 2106RLC: RLC load,
- DL 2109D33: True RMS meter,
- DL 4236: Load manager,
- DL 2655: Variable 3 phase transformer,
- DL 2025DT: Tachometer,
- DL 10200A1: Shunt motor,
- DL 10250A1: Shunt generator,
- DL 10120A1: Slip-ring motor,
- DL 10120RA: Rotor rheostat,
- DL 2108T26-LP: Brushless controller,
- DL 2108T26BR: Brake resistor,
- MOTBRA1.3NM: 1.3Nm brushless motor,
- DL 10400: Base frame,
- DL 10115A1: Squirrel cage motor,
- DL 2600TTI: Isolated transformer,
- DL T12090_SK: 120x90 working bench,
- DL T06090: 60x90 working bench,
- DL A120-3M: Frame with 3 levels, basic version,
- DL SP-A120-LED: Upper base with LED strip, for DL A120-3M,
- DL PCGRID: Computer All in one,
- TLDCA2.0: Kit of connecting leads,
- DL 1196: Holder for leads.
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